JP2008041929A

JP2008041929A - Stationary induction electric appliance

Info

Publication number: JP2008041929A
Application number: JP2006214198A
Authority: JP
Inventors: Akira Yamagishi; 明山岸; Masakazu Yokoyama; 雅一横山; Yoshio Hamadate; 良夫浜館; Hiroshi Miyao; 博宮尾
Original assignee: Japan AE Power Systems Corp
Current assignee: Japan AE Power Systems Corp
Priority date: 2006-08-07
Filing date: 2006-08-07
Publication date: 2008-02-21

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and light-weight stationary induction electric appliance to which a nonmagnetic shield can effectively be attached. <P>SOLUTION: The stationary induction electric appliance has iron core legs 1, and yokes 2 that are disposed on and under the iron core legs. It also houses a body that comprises an iron core for disposing iron core clamping fittings 3 on both sides of respective yoke 2, and winding wires 4 that wind around the iron core legs 1 in a tank 5 that is filled with an insulating medium. Furthermore, an insulating medium 6 is enclosed therein, and a nonmagnetic shield 7 is attached to an inner surface in the longitudinal direction of the tank 5. The respective upper and lower iron core clamping fittings 3 are provided with extension supporter 3A that projects from the external dimension of the winding towards the ends in the longitudinal direction. Nonmagnetic shields 8 are attached between respective upper and lower extension supporters, and the nonmagnetic shields 8 are located between the outer surface of the winding 4 and tank 5. Moreover, a nonmagnetic material shield is attached to each of opposing parts of the extension supporters 3A of respective upper and lower iron clamping fitting 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は変圧器やリアクトル等の静止誘導電器に係り、特にタンクや鉄心締付金具に非磁性体シールドを備えた静止誘導電器に関するものである。 The present invention relates to a static induction electric device such as a transformer or a reactor, and more particularly to a static induction electric device provided with a nonmagnetic shield in a tank or an iron core clamp.

変圧器やリアクトル等の静止誘導電器は、良く知られているように大容量化しており、例えば変圧器の場合には全体構造が大型化している。変圧器の大型化は、運転の際にタンク内部に収納する巻線や接続用リード線から、タンク内部に漏れ出る漏洩磁束も増加することになる。この漏洩磁束は、変圧器を構成するタンクや鉄心締付金具等の構造物に侵入して渦電流を誘起し、渦電流に基づき局部的な温度上昇を引き起こして損失を発生させるため、製品の性能や信頼性等の面から問題となる。 As is well known, static induction machines such as transformers and reactors have a large capacity. For example, in the case of a transformer, the overall structure is large. Increasing the size of the transformer also increases the amount of leakage magnetic flux that leaks into the tank from the windings and connection lead wires housed inside the tank during operation. This leakage magnetic flux invades structures such as the tanks and iron core clamps that make up the transformer, induces eddy currents, causes local temperature rise based on the eddy currents, and generates losses. This is a problem in terms of performance and reliability.

通常、変圧器では、タンクの内面に銅やアルミニュウムの非磁性材製か、珪素鋼板等の磁性材製のシールドを適宜取り付け、タンクに侵入する巻線等からの漏洩磁束の影響を減少することが行われている（特許文献１参照）。このように、タンクの内面に、非磁性材製や磁性材製のシールド板を取り付ける場合には、漏洩磁束の進入によりシールド板が温度上昇するのを抑えるため、タンク内に封入する油等の絶縁媒体で効果的に冷却できる構造にしている。 Normally, in transformers, a shield made of non-magnetic material such as copper or aluminum or magnetic material such as silicon steel plate is appropriately attached to the inner surface of the tank to reduce the influence of magnetic flux leakage from windings entering the tank. (See Patent Document 1). Thus, when attaching a shield plate made of non-magnetic material or magnetic material to the inner surface of the tank, in order to suppress the temperature rise of the shield plate due to the entry of leakage magnetic flux, It has a structure that can be effectively cooled by an insulating medium.

また、鉄心締付金具は、鉄心脚の上下継鉄の両側に配置されるので、鉄心脚に巻装する巻線の上下端部の近傍に位置することから、漏洩磁束の侵入による影響も大きいので、次のような種々の対策を行っている。 In addition, since the iron core clamps are arranged on both sides of the upper and lower yokes of the iron core legs, they are located in the vicinity of the upper and lower ends of the windings wound around the iron core legs, so that the influence of leakage magnetic flux is large. Therefore, the following various measures are taken.

例えば、従来からの漏洩磁束の対策として、連結金具で連結する両側の鉄心締付金具の面である最上面に、それぞれ高導電性部材よりなる磁気シールド板を設け、両側のシールド板はそれらの両端部や巻線の相間部で、高導電性部材により導電結合することが提案されている(特許文献２参照)。 For example, as a countermeasure against conventional leakage magnetic flux, magnetic shield plates made of highly conductive members are provided on the uppermost surfaces of the iron core clamps on both sides connected by the connection brackets, and the shield plates on both sides It has been proposed that conductive coupling is performed by a highly conductive member at both ends and interphase portions of windings (see Patent Document 2).

また、３相鉄心の長手方向両側部とタンクとの間にそれぞれ長板状電磁シールド一対を設置し、それぞれ一対の長板状電磁鋼板シールドの各自由端部を橋渡すように、アルミニュウム又は銅等製の小板を設置する変圧器の電磁シールドも知られている。(特許文献３参照)。更に、コアの中心片（鉄心脚）にコイルを巻装するとき、コイルがコアから露出している部分のコイル側面に、高導磁率磁性板を配置する磁気シールド型電源トランスも提案されている(特許文献４参照)。 Also, a pair of long electromagnetic shields is installed between the longitudinal sides of the three-phase iron core and the tank, and aluminum or copper is used to bridge each free end of the pair of long electromagnetic shields. Also known are electromagnetic shields for transformers that have a small plate made of or the like. (See Patent Document 3). Furthermore, a magnetic shield type power transformer has also been proposed in which, when a coil is wound around the core piece (iron leg) of the core, a high magnetic conductivity magnetic plate is arranged on the side of the coil where the coil is exposed from the core. (See Patent Document 4).

特開２０００−１１４０７２号公報JP 2000-114072 A 特公昭５９−４６４０６号公報Japanese Patent Publication No.59-46406 実開平１−９２１１４号公報Japanese Utility Model Publication No. 1-92114 実開平４−１０３２５号公報Japanese Utility Model Publication No. 4-10325

しかし、特許文献１等の如くタンクの内面に取り付けるシールド板を、シールド板の取り付けの効果を上げ、しかもタンク内に封入する油等の絶縁媒体で効果的に冷却できる構造にしようとすると、タンクとシールド板との寸法が大きくなり、この結果、絶縁媒体の量も増加するため、全体が大型化して据付面積も大きくなってしまう問題がある。 However, if the shield plate attached to the inner surface of the tank as in Patent Document 1 is designed to increase the effect of attaching the shield plate and can be effectively cooled by an insulating medium such as oil sealed in the tank, the tank As a result, the size of the shield plate is increased, and as a result, the amount of the insulating medium is also increased.

また、特許文献２のように鉄心締付金具の最上面に高導電性部材よりなる２枚の磁気シールド板をその長手方向に設け、少なくとも両端を高導電性部材で連絡すれば、鉄心締付金具での発生損失を小さくできるが、変圧器の小型軽量化を図るには十分でない問題がある。更に、特許文献３の構造では、アルミニュウム又は銅等製の小板を設置することにより、タンク底板での発生損失を小さくでき、また特許文献４の構造では、コイルの側面に高導磁率磁性板を密着させることにより、漏れ磁束を低減できる。しかし、これらの構造は大容量の送配電用変圧器への適用するには十分なものではなく、適用したとしても小型軽量化には役立たない問題がある。 Further, as in Patent Document 2, if two magnetic shield plates made of a highly conductive member are provided in the longitudinal direction on the uppermost surface of the iron core fastening bracket and at least both ends are connected by the highly conductive member, the iron core is tightened. Although the loss generated by the metal fittings can be reduced, there is a problem that is not sufficient for reducing the size and weight of the transformer. Furthermore, in the structure of Patent Document 3, the generation loss in the tank bottom plate can be reduced by installing a small plate made of aluminum, copper, or the like. In the structure of Patent Document 4, a high magnetic permeability magnetic plate is provided on the side surface of the coil. By adhering, the magnetic flux leakage can be reduced. However, these structures are not sufficient for application to large-capacity power transmission and distribution transformers, and even if applied, there is a problem that they are not useful for reducing the size and weight.

本発明の目的は、非磁性シールドを効果的の取り付け、小型軽量化を図れる静止誘導電器を提供することにある。 An object of the present invention is to provide a stationary induction device that can be effectively attached with a non-magnetic shield and can be reduced in size and weight.

また本発明の他の目的は、鉄心締付金具部分での過大な損失集中や温度上昇による不具合を除去できる静止誘導電器を提供することにある。 Another object of the present invention is to provide a static induction electric appliance capable of eliminating problems caused by excessive loss concentration and temperature rise in the iron core clamp part.

本発明の静止誘導電器は、鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置して構成する際に、前記上下の各鉄心締付金具はその長手方向端部に巻線外形寸法より突出する延長支持部を設け、前記上下の各延長支持部間に非磁性シールドを取り付けて前記巻線外面とタンク間に位置させて構成したことを特徴とする。 The static induction electric machine of the present invention includes an iron core having an iron core leg portion and upper and lower yoke portions, and an iron core fastening bracket disposed on both sides of each yoke portion, and a winding wound around the iron core leg portion. When the main body consisting of wires is housed in a tank filled with an insulating medium and a shield is arranged in the tank, the upper and lower iron core clamps are wound around their longitudinal ends. An extension support portion that protrudes from the outer dimensions of the line is provided, and a nonmagnetic shield is attached between the upper and lower extension support portions, and is positioned between the outer surface of the winding and the tank.

また、本発明の静止誘導電器は、鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置して構成する際に、前記上下の各鉄心締付金具はその長手方向端部に巻線外形寸法より突出する延長支持部を設け、前記上下の各延長支持部間に非磁性シールドを取り付けて前記巻線外面とタンク間に位置させると共に、前記両側に配置する各鉄心締付金具の延長支持部の対向面部分にそれぞれ非磁性シールドを取り付けて構成したことを特徴とする。 Further, the static induction electric appliance of the present invention includes an iron core having an iron core leg portion and upper and lower yoke portions, and an iron core fastening bracket disposed on both sides of each yoke portion, and wound around the iron core leg portion. When the upper and lower core fastening brackets are configured to be housed in a tank filled with an insulating medium and arranged with a shield in the tank, An extension support part protruding from the outer dimension of the winding is provided on the upper side, and a nonmagnetic shield is attached between the upper and lower extension support parts to be positioned between the outer surface of the winding and the tank, and the iron cores arranged on both sides are fastened. The present invention is characterized in that a nonmagnetic shield is attached to each of the opposing surface portions of the extension support portion of the metal fitting.

しかも、前記延長支持部を設ける両側の鉄心締付金具間を、短絡回路を形成する非磁性体シールドにて連結して構成したことを特徴とする。また、前記延長支持部は前記各鉄心締付金具にて一体に構成、或いは前記延長支持部は取り付け部を形成した支持金具を前記各鉄心締付金具の端部に固定して構成したことを特徴とする。 Moreover, the iron core clamps on both sides where the extension support portion is provided are connected by a nonmagnetic shield that forms a short circuit. In addition, the extension support part is configured integrally with each iron core fastening bracket, or the extension support part is configured by fixing a support metal fitting forming an attachment part to an end of each iron core fastening metal fitting. Features.

更に、本発明の静止誘導電器は、鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置して構成する際に、前記上下の各鉄心締付金具はその長手方向端部に巻線外形寸法より突出する延長支持部を設け、前記上下の各延長支持部間に非磁性シールドを取り付けて前記巻線外面とタンク間に位置させると共に、前記両側に配置する各鉄心締付金具の延長支持部の対向面部分にそれぞれ非磁性シールドを取り付けて構成したことを特徴とする。 Further, the static induction electric appliance of the present invention includes an iron core having an iron core leg portion and upper and lower yoke portions, and an iron core fastening bracket disposed on both sides of each of the yoke portions, and wound around the iron core leg portion. When the upper and lower core fastening brackets are configured to be housed in a tank filled with an insulating medium and arranged with a shield in the tank, An extension support part protruding from the outer dimension of the winding is provided on the upper side, and a nonmagnetic shield is attached between the upper and lower extension support parts to be positioned between the outer surface of the winding and the tank, and the iron cores arranged on both sides are fastened. The present invention is characterized in that a nonmagnetic shield is attached to each of the opposing surface portions of the extension support portion of the metal fitting.

本発明のように静止誘導電器のタンクへの漏れ磁束の侵入を阻止する非磁性体シールドを、上部及び下部鉄心締付金具に取り付けてタンクと巻線間の絶縁媒体中に位置させるように構成すれば、非磁性体シールドを絶縁媒体によって効果的に冷却することができる。従って、漏れ磁束の侵入で発熱するシールド等の冷却に必要なタンク内の絶縁媒体量を減少できるため、静止誘導電器全体を小型軽量化して据付面積を縮小することができる。 A non-magnetic shield that prevents leakage magnetic flux from entering the tank of the static induction appliance as in the present invention is attached to the upper and lower iron core clamps and is positioned in the insulating medium between the tank and the winding. Then, the nonmagnetic shield can be effectively cooled by the insulating medium. Accordingly, since the amount of the insulating medium in the tank necessary for cooling the shield that generates heat due to the intrusion of the leakage magnetic flux can be reduced, the entire static induction electric appliance can be reduced in size and weight and the installation area can be reduced.

また、本発明のように静止誘導電器の上及び下の鉄心締付金具部分に巻線外形寸法より突出する延長支持部の一部に、非磁性体シールドを適切に設けたので、上及び下の鉄心締付金具部分における漏洩磁束に基づく損失増加や温度上昇による不具合を防止できる。 In addition, since the non-magnetic shield is appropriately provided on a part of the extension support part protruding from the outer dimension of the winding wire on the upper and lower iron core clamp parts as in the present invention, the upper and lower This can prevent the increase in loss due to the leakage magnetic flux and the temperature rise in the iron core fastening bracket part.

本発明の静止誘導電器では、鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置して構成する際に、タンクと巻線外面間に配置する非磁性シールドを適切に取り付け、上下の各継鉄部の両側に配置する鉄心締付金具部分に非磁性シールドを適切に取り付けて構成している。 In the static induction electric machine of the present invention, an iron core having an iron core leg portion and upper and lower yoke portions, and an iron core fastening bracket disposed on both sides of each yoke portion, and a winding wound around the iron core leg portion. When the main body consisting of wires is housed in a tank filled with an insulating medium and a shield is placed in the tank, a non-magnetic shield placed between the tank and the outer surface of the winding is properly attached. The non-magnetic shield is appropriately attached to the core fastening metal parts disposed on both sides of the upper and lower yoke parts.

本発明を３相３脚変圧器に適用した図１及び２に示す実施例を用いて説明する。３相３脚変圧器は、タンク５の内部に変圧器本体を収納し、タンク５内に絶縁用及び冷却媒体用として活用する絶縁油や絶縁ガス等の絶縁媒体６を封入して製作する。 The present invention will be described with reference to an embodiment shown in FIGS. 1 and 2 in which the present invention is applied to a three-phase three-leg transformer. The three-phase three-leg transformer is manufactured by housing the transformer main body inside the tank 5 and enclosing the insulating medium 6 such as insulating oil or insulating gas used for insulating and cooling medium in the tank 5.

変圧器本体は、各相分の３つの鉄心脚部１と、各鉄心脚部1の上下に配置する継鉄２と、上下の継鉄２の両側にそれぞれ配置して締付固定する鉄心締付金具３とにより積層鉄心を形成し、この３つの鉄心脚部１にそれぞれ各相分の巻線４を配置して構成している。この例では、タンク５の長手方向の内面に、非磁性体シールド７を取り付けている。タンク５の内面に取り付けるシールドは、公知のように非磁性体シールドに限らず磁性体シールドを用いることも、またこれらを組み合せて用いることもできる。 The transformer body consists of three core legs 1 for each phase, the yokes 2 arranged above and below each core leg 1, and the core clamps that are arranged and fixed on both sides of the upper and lower yokes 2 respectively. A laminated iron core is formed by the metal fittings 3, and the windings 4 for each phase are arranged on the three iron core legs 1. In this example, a nonmagnetic shield 7 is attached to the inner surface of the tank 5 in the longitudinal direction. As is well known, the shield attached to the inner surface of the tank 5 is not limited to a non-magnetic shield, and a magnetic shield can be used, or a combination thereof can be used.

上下の各鉄心締付金具３は、その長手方向端部に巻線４の外形寸法より突出する延長支持部３Ａを設け、この部分を非磁性体シールドの取り付けに活用している。即ち、一般に、鉄心締付金具３は、巻線４の押さえに利用するため、巻線４端面に対向位置の程度までの長さとするが、本発明では各鉄心締付金具３の長手方向端部に、更に巻線４の外形寸法よりも伸びて突出する延長支持部３Ａを設けている。そして、これら上下の両側の延長支持部３Ａ間に非磁性体シールド８を取り付けてタンク５と平行になるようにし、非磁性体シールド８を端部相の巻線４外面とタンク５間の絶縁媒体中に位置させて漏洩磁束の対策に活用している。 Each of the upper and lower iron core fastening fittings 3 is provided with an extended support portion 3A that protrudes from the outer dimension of the winding 4 at the end in the longitudinal direction, and this portion is utilized for attachment of a nonmagnetic shield. In other words, in general, the iron core fastener 3 is used to hold the winding 4 and has a length up to the position opposite to the end face of the coil 4. The part is further provided with an extended support part 3 </ b> A that extends beyond the outer dimensions of the winding 4 and protrudes. A nonmagnetic shield 8 is attached between the upper and lower extension support portions 3A so as to be parallel to the tank 5, and the nonmagnetic shield 8 is insulated between the outer surface of the winding 4 of the end phase and the tank 5. It is located in the medium and used as a countermeasure for leakage flux.

各延長支持部３Ａは、鉄心締付金具３の長手方向端部を所定寸法延長し、シールド取り付け部を形成して一体に作成しても、又は取り付け部を形成した支持金具３Ａを、各鉄心締付金具３の長手方向端部に溶接やフランジ接続で固定して構成することができる。 Each extension support portion 3A extends the end portion in the longitudinal direction of the iron core fastening bracket 3 by a predetermined dimension, and forms a shield attachment portion or integrally forms the support fitting 3A having the attachment portion. It can be configured to be fixed to the longitudinal end portion of the clamp 3 by welding or flange connection.

非磁性体シールド８は、銅板或いはアルミニウム板等の良導電性材料を用いて、端部相の巻線４６にほぼ対向する面を有し、漏洩磁束を適切に遮蔽できる大きさにする。そして、当然のことながら非磁性体シールド８は、高電圧部分の絶縁を損なわず、かつタンク５面への漏洩磁束を遮蔽できる位置に取り付けるようにする。 The nonmagnetic shield 8 is made of a highly conductive material such as a copper plate or an aluminum plate, and has a surface substantially facing the winding 46 in the end phase so that the leakage magnetic flux can be properly shielded. As a matter of course, the non-magnetic shield 8 is attached at a position where the insulation of the high voltage portion is not impaired and the leakage magnetic flux to the tank 5 surface can be shielded.

本発明では、積層鉄心の継鉄部２の両側に配置する上下の鉄心締金具３に延長支持部３Ａを設け、この各延長支持部３Ａ部分に非磁性体シールド８を取り付けて、非磁性体シールド８を巻線４外面とタンク５間に位置させているため、各相の巻線４、特に端部相の巻線４から破線矢印で示すようにタンク５に侵入しようとする漏れ磁束は、非磁性体シールド８に流れる渦電流の反磁界作用により、侵入を効果的に阻止できる。しかも、非磁性体シールド８はこの両面が絶縁媒体６に接して効果的に冷却できるから、非磁性体シールド８の局部的な温度上昇を抑制でき、冷却油の絶縁媒体４の量も減少できることから、変圧器の小型軽量化が可能となる。 In the present invention, the upper and lower iron core fasteners 3 arranged on both sides of the yoke part 2 of the laminated iron core are provided with the extension support portions 3A, and the non-magnetic material shield 8 is attached to each of the extension support portions 3A, thereby providing a non-magnetic material. Since the shield 8 is positioned between the outer surface of the winding 4 and the tank 5, the leakage magnetic flux that attempts to enter the tank 5 from the winding 4 of each phase, particularly the winding 4 of the end phase, as indicated by the broken line arrow, is Intrusion can be effectively prevented by the demagnetizing field action of the eddy current flowing through the nonmagnetic shield 8. Moreover, since both surfaces of the nonmagnetic shield 8 can be effectively cooled by contacting both sides of the insulating medium 6, local temperature rise of the nonmagnetic shield 8 can be suppressed, and the amount of the insulating medium 4 of cooling oil can be reduced. Therefore, the transformer can be reduced in size and weight.

本発明の他の実施例である図３に示す変圧器は、上記した実施例と同様に上下の各鉄心締付金具３は、その長手方向端部に巻線４の外形寸法より突出する延長支持部３Ａを設けている。そして、この上下の各鉄心締付金具３の延長支持部３Ａは、その対向面部分にそれぞれ非磁性体シールド９を取り付けている。この結果、巻線４からの漏れ磁束は、非磁性体シールド９に流れる渦電流の反磁界作用により、侵入を効果的に阻止できため、過大な損失の集中や温度上昇による問題を効果的に防止することができる。 The transformer shown in FIG. 3, which is another embodiment of the present invention, is similar to the above-described embodiment in that each of the upper and lower iron core fastening fittings 3 is extended from the outer dimension of the winding 4 at its longitudinal end. A support portion 3A is provided. The extension support portions 3A of the upper and lower iron core fastening fittings 3 are each provided with a nonmagnetic shield 9 on the facing surface portion. As a result, the leakage magnetic flux from the winding 4 can be effectively prevented from entering due to the demagnetizing field action of the eddy current flowing in the non-magnetic shield 9, effectively preventing problems due to excessive loss concentration and temperature rise. Can be prevented.

この実施例においても、上記したように上下の両側の延長支持部３Ａ間に、漏洩磁束の対策用の非磁性体シールド８を取り付けてタンク５と平行になるようにし、非磁性体シールド８を端部相の巻線４外面とタンク５間の絶縁媒体中に位置させ、同様な効果を達成するようにしている。 Also in this embodiment, as described above, the nonmagnetic shield 8 for preventing leakage magnetic flux is attached between the extended support portions 3A on the upper and lower sides so as to be parallel to the tank 5, and the nonmagnetic shield 8 is A similar effect is achieved by being positioned in an insulating medium between the outer surface of the end phase winding 4 and the tank 5.

本発明の別の実施例である図４に示す変圧器は、図３で説明した構造とすると共に、更に上下の継鉄部２の両側に配置する鉄心締金具３は、その長手方向端部に設ける延長支持部３Ａ部分間に、複数の非磁性体シールド９及び１０を取り付けて短絡回路を設ける構成としている。 The transformer shown in FIG. 4 which is another embodiment of the present invention has the structure described in FIG. 3, and further, the iron core fasteners 3 arranged on both sides of the upper and lower yoke parts 2 have longitudinal end portions thereof. A plurality of non-magnetic shields 9 and 10 are attached between the extended support portions 3A provided in the structure to provide a short circuit.

この実施例では、上記実施例で達成できる効果の他、延長支持部３Ａを設ける鉄心締付金具３部分と複数の非磁性体シールド９及び１０による短絡回路に渦電流が流れ、その渦電流による反作用磁界によりタンクのカバー（図示せず）への漏れ磁束の侵入を阻止することができるから、タンクのカバーにおける過大な損失集中や温度上昇による問題を効果的に防止することができる。 In this embodiment, in addition to the effects that can be achieved in the above-described embodiment, an eddy current flows through a short circuit formed by the core fastening bracket 3 portion provided with the extension support portion 3A and the plurality of nonmagnetic shields 9 and 10, and the eddy current Since the counter magnetic field can prevent leakage magnetic flux from entering the tank cover (not shown), problems due to excessive loss concentration and temperature rise in the tank cover can be effectively prevented.

上記した各実施例においては、本発明を３相３脚変圧器に適用した例で説明したが、単相変圧器やリアクトルにも適用できることは明らかであり、この場合にも同様な効果を達成することができる。 In each of the above-described embodiments, the present invention has been described with reference to an example in which the present invention is applied to a three-phase three-leg transformer. However, it is obvious that the present invention can be applied to a single-phase transformer and a reactor, and in this case, the same effect is achieved. can do.

本発明の一実施例である３相３脚変圧器を一部断面して示す平面図である。It is a top view which partially shows the three-phase three-leg transformer which is one Example of this invention. 図１のＡ−Ａ線より見た一部断面して示す側面図である。FIG. 2 is a side view showing a partial cross section as seen from line AA in FIG. 1. 本発明の他の実施例である３相３脚変圧器の端部のみを一部断面して示す平面図である。It is a top view which shows a partial cross section only only the edge part of the three-phase three-leg transformer which is another Example of this invention. 本発明の別の実施例である３相３脚変圧器の端部のみを一部断面して示す平面図である。It is a top view which shows only a part section and shows only an end of a 3 phase 3 leg transformer which is another example of the present invention.

符号の説明Explanation of symbols

１…鉄心脚部、２…継鉄部、３…鉄心締付金具、３Ａ…延長支持部、４…巻線、５…タンク、６…絶縁媒体、７、８、９、１０…非磁性体シールド。
DESCRIPTION OF SYMBOLS 1 ... Iron core leg part, 2 ... Relay part, 3 ... Iron core fastening metal fitting, 3A ... Extension support part, 4 ... Winding, 5 ... Tank, 6 ... Insulating medium, 7, 8, 9, 10 ... Nonmagnetic material shield.

Claims

鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置する静止誘導電器において、前記上下の各鉄心締付金具はその長手方向端部に巻線外形寸法より突出する延長支持部を設け、前記上下の各延長支持部間に非磁性シールドを取り付けて前記巻線外面とタンク間に位置させて構成したことを特徴とする静止誘導電器。 A core part having an iron core leg part and a yoke part on the upper and lower sides thereof, and an iron core fastening metal fitting disposed on both sides of each yoke part, and a winding wound around the iron core leg part, In a static induction appliance that is housed in a tank filled with an insulating medium and in which a shield is disposed in the tank, the upper and lower iron core clamps are extended support portions that protrude from the outer dimensions of the winding at the longitudinal ends thereof. And a non-magnetic shield is attached between the upper and lower extension support portions and is positioned between the outer surface of the winding and the tank.

鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置する静止誘導電器において、前記上下の各鉄心締付金具はその長手方向端部に巻線外形寸法より突出する延長支持部を設け、前記上下の各延長支持部間に非磁性シールドを取り付けて前記巻線外面とタンク間に位置させると共に、前記両側に配置する各鉄心締付金具の延長支持部の対向面部分にそれぞれ非磁性シールドを取り付けて構成したことを特徴とする静止誘導電器。 A core part having an iron core leg part and a yoke part on the upper and lower sides thereof, and an iron core fastening metal fitting disposed on both sides of each yoke part, and a winding wound around the iron core leg part, In a static induction appliance that is housed in a tank filled with an insulating medium and in which a shield is disposed in the tank, the upper and lower iron core clamps are extended support portions that protrude from the outer dimensions of the winding at the longitudinal ends thereof. A non-magnetic shield is attached between the upper and lower extension support portions and is positioned between the outer surface of the winding and the tank, and each of the opposing surface portions of the extension support portions of the iron core clamps disposed on both sides is provided. A static induction device characterized by having a non-magnetic shield attached.

請求項２において、前記延長支持部を設ける両側の鉄心締付金具間を、短絡回路を形成する非磁性体シールドにて連結して構成したことを特徴とする静止誘導電器。 The stationary induction device according to claim 2, wherein the iron core clamps on both sides where the extension support portion is provided are connected by a nonmagnetic shield that forms a short circuit.

請求項１から３のいずれかにおいて、前記延長支持部は前記各鉄心締付金具にて一体に構成したことを特徴とする静止誘導電器。 4. The stationary induction device according to claim 1, wherein the extension support portion is formed integrally with each of the iron core fastening fittings.

請求項１から３のいずれかにおいて、前記延長支持部は取り付け部を形成した支持金具を前記各鉄心締付金具の端部に固定して構成したことを特徴とする静止誘導電器。 4. The stationary induction device according to claim 1, wherein the extension support portion is configured by fixing a support fitting having an attachment portion to an end portion of each of the iron core fastening fittings.

鉄心脚部とこの上下に継鉄部とを有して前記各継鉄部の両側に鉄心締付金具を配置する鉄心と、前記鉄心脚部に巻回する巻線とからなる本体部を、絶縁媒体を充填するタンク内に収納し、前記タンクの内にシールドを配置する静止誘導電器において、前記上下の各鉄心締付金具はその長手方向端部に巻線外形寸法より突出する延長支持部を設け、前記両側に配置する鉄心締付金具の各延長支持部の対向面部分にそれぞれ非磁性シールドを取り付けて構成したことを特徴とする静止誘導電器。
A core part having an iron core leg part and a yoke part on the upper and lower sides thereof, and an iron core fastening metal fitting disposed on both sides of each yoke part, and a winding wound around the iron core leg part, In a static induction appliance that is housed in a tank filled with an insulating medium and in which a shield is disposed in the tank, the upper and lower iron core clamps are extended support portions that protrude from the outer dimensions of the winding at the longitudinal ends thereof. And a non-magnetic shield is attached to each of the opposing surface portions of the extension support portions of the iron core clamps disposed on both sides.